Atomizing nozzle



June 17, 1941. F. c. GRISWOLD ATIOMIZING NOZZLE Filed Jan. 27,-;1940 4Sheets-Sheet 2 'llll I'lllll mmfi mmwm l F. c. GRISWOLD .245975ATOMYIZING NOZZLE Filed Jan. 27, 1940 4 Sheets-Sheet s June 17,1941.

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ATOMIZING NOZZLE Filed Jan. 27, 1940 4 Sheets-Sheet 4 Patented June 17,1941 UNITED STATES PATENT OFFICE' ATOMIZING NOZZLE Frederick C.Griswold, Port Jefferson, N. Y.

Application January 27, 1940, Serial No. 316,035

10 Claims.

chamber hydraulically, it has been difflcult to break the oil into atomssmall enough to thoroughly mix with the air and thereby provide for goodcombustion and economical operation. Also, it has been more difficult toproduce good atomization of extremely small quantities of fluid fuelthan relatively larger quantities thereof.

One of the principal objects of the present invention-therefore; is toprovide a novel atomizing nozzle which will break thefluid fuel intoextremely small atoms irrespective of thequantity of fuel discharged orthe length of time of the atomization period, within reasonable limits.

Another object of the present invention is to provide an atomizingnozzle which will atomize fluid fuel into minute atoms from thebeginning to the ending of the atomization period.

Still another object of the present invention is to provide an atomizingnozzle that is not apt to clog or become stopped up because of foreignmatter becoming lodged in the restricted areas of the nozzle.

As in my co-pendin'g application for U. S. Letters Patent, Ser. No.316,034, flled'Jan. 27, 1940, the present nozzle includes a body havinga discharge port and provided with a bearing surface for a movable valvemember, which bearing surface is disposed at right angles to the axis ofthe discharge port, and which discharge port is tapered from thisbearing surface so as to flare outwardly therefrom and produce a knifeedge at the bearing surface or at the minute orifice formed by thesmaller inner end of the port. In my aforesaid co-pending application,the, nozzle has a slide valve which is given a reciprocating rectilinearmovement, whereas the movable valve member in the nozzle of the presentapplication is given a reciprocating rotary movement.

Further objects and features of the present invention will becomeapparent from the following description when considered in connectionwith the accompanying drawings, in which:

Figure 1 is a fragmentary vertical sectional view through the head endof an engine cylinder equipped with an atomizing nozzle constructed inaccordance with the present invention.

Figure 2 is a horizontal section on line 2-4 of Figure l.

Figure 3 is a fragmentary vertical section taken on the plane of line3--3 of Figure 1 Figure 4 is a fragmentary vertical section takenthrough the discharge end of the nozzle shown in Figure 1 and drawn onan enlarged scale with the movable valve member in open position.

Figure 5 is a horizontal section on line 5-5 of Figure 4.

Figure -6 is a horizontal section of Figure 4.

Figure 7 is an enlarged fragmentary perspecon line 6-0 .tive view of theinner end portion of the valve stem forming part of the nozzle shown inFigure 1.

- Figure 8 is an enlarged perspective view of the movable valve memberforming part of the nozzle shown in Figure 1.

Figure 9 is a top plan view of a modified form of movable valve memberwhich may be em-- ployed in lieu of the valve member Figure 8.

Figure 10 is a top plan view of a wall member for the nozzle body havinga modified form shown in of discharge port.

Figure 11 is a view similar to Figure 1 showing a modified form ofatomizing nozzle constructed in accordance with the present invention.

' Figure 12 is a transverse vertical 'section on line l2--l2 of Figure11.

Figure 13 is a view similar to Figure 4 showing a further modificationof the valve member and discharge port arrangement.

Figure 14 is a transverse section on line H-ll of Figure 13.

. Figure 15 is a view similar to Figure 11 of still another modificationof the present atomizing nozzle.

Figure 16 is a view similar to Figure 15 of yet another modification. I

Figure 17 is a diagrammatic plan view illustrating the manner in whichthe elements of Figures 9 and 10 will cooperate, when embodied in thepresent nozzle, for regulating the volume of mi discharged; and

Figure 18 is a view similar to Figure 4 of still another modification ofthe ported wall of the nozzle body and of the movable valve membercooperating therewith.

is also provided with a wall affording an inner bearing surface 3 andhaving an outwardly flared discharge port 4 at said bearing surface 3.The discharge port 4 flares outwardly from the bearing surface 3 toprovide a minute orifice 5 and a knife edge 6 at the inner end of saidport 4. The purpose of this is clearly explained in my above-mentionedco-pending application. A movable valve member I is seated by pressureagainst the bearing surface 3 and controls the discharge port 4.

In the embodiment illustrated in Figure 1, the wall having the bearingsurface 3 consists of a disk member having a beveled edge adapted toengage the beveled end edge of'the nozzle body proper as at 8 andsecurely held in place by means of a screw ring 9 having an inwardlydirected annular end flange Ill arranged to engage the margin of thedisk as shown clearly in Figure 4, the ring 9 being threaded on thelower or inner end of the nozzle body proper as shown. This constructionand assembly provides for economical manufacture and at the same timeavoids leakage where the beveled joint is provided between the porteddisk and the nozzle body proper. These edges may be efi'fectively groundand likewise with respect to the contiguous faces of the disk and themovable valve member 1.

Means is provided for imparting a reciprocating rotary motion to thevalve member 'i which is also in the form of a disk. For this purpose, avalve stem H is rotatably fitted in the bore of the body and has itsinner or lower end formed to provide crossed bits |2 which are beveledupwardly and outwardly and are arranged to engage in crossed grooves |3provided in the upper surface of the valve member 1. Due to the bevelingof the bits l2, the valve member 1 is capable of limited lateral tiltingrelative to the stem so as to always flatly contact the bearing surface3. Obviously, the engagement of the bits |2 in the grooves l3 afiord thenecessary driving connection between the stern H and the valve member I.A longitudinal groove or other passage M in the stem provides for thenecessary flow of fluid from the inlet 2 to the space immediately abovethe valve member and said valve member 'I has a suitable outlet port orpassage |5 therethrough which is normally out of registry with thedischarge port 4 but situated so that limited turning of the valvemember I will result in bringing the port I5 in registry with the port4. The valve member I is not only seated by the pressure of the fluidagainst the bearing surface 3, but also by the pressure of a helicalcompression spring IS interposed between the upper end of the stem H anda plug threaded into the upper end of the body I. As shown, the head l8of the ensine cylinder I9 is provided with a chamber 20 in which thelower end portion of the body .is snugly fitted, the body and thechamber 20 being correspondingly tapered. At the bottom of the chamber20, .there is provided an inlet 2| communicating with the top of acombustion chamber 22 which has been illustrated as partly formed in thehead I8 and partly formed in the piston head 23 of cylinder I9. Theinlet 2 is suitably coupled to a pipe 24 leading from a suitable sourceof supply of fluid fuel under pressure.

The means for imparting reciprocating rotary motion to the stem II andvalve member I may take any one of many difi'erent mechanical forms.

As illustrated, the upper end of the stem may be formed to provide asegment gear 24 meshing with a horizontal rack bar 25 slidable in anintermediate chamber 25 of the nozzle body I. The chamber 26 is in linewith the inlet 2 and a nipple 21 extending laterally from the oppositeside of thebody Fitted and secured in the nipple 21 is a tubular guide28 having an axial bore receiving a stem 29 rigid with one end of therack bar 25. This stem 29 projects into the adjacent end of a cylinder30 which is screwed onto the nipple 21 and which has a plunger- 3|slidably fitted therein. The plunger 3| is urged in contact with thestem 29 by means of a helical compression spring 32 arranged in thecylinder or housing 30 between the plunger 3| and a cap 33 threaded onthe outer end of the cylinder or housing 39. Spring 32 urges the plunger3| to the left of Figure 1 and thereby moves the stem 29 and rack 'bar25 so as to rotate the stem II and the valve member 1 to a positionwherein said valve member I is in closed position. The plunger 3| issuitably vented and guided so as to insure free movement of the plunger3| at all times, as described in connection with a similar arrangementin my abovementioned co-pending application. In this form or embodiment,a valve seat 34 is provided where the fluid inlet 2 meets the bore ofthe body and an end of the rack bar 25 is formed to provide a valvemember 35 arranged to engage said seat andnormally cut ofi communicationbetween the intlet 2 and the interior of the nozzle body. When thepressure of the fluid exceeds the strength of the spring 32, the rackbar 25 will be moved so as to unseat the valve part 35 and permit fluidto flow under pressure into the space directly above the valve member I.As this takes place, the stem H is turned so as to similarly turn thevalve member I and bring the port IS in registry with the discharge port4. The fluid fuel is then discharged in a spray into the combustionchamber 22, the volume of fluid discharged depending upon the degree ofopening movement of the valve member I as controlled by the pressure ofthe fluid supplied to the nozzle. As soon as the pressure of the fluidis lowered below the strength of the spring 32, said spring will act toreversely move the rack bar 25- and thereby reversely turn the stem IIand valve member 1 until the latter is closed. The nozzle is suitablysecured in place within the chamber 20, such as by means of bolts 36threaded into the cylinder head l8 and having swivelled engagement in aswell as being laterally removable from slotted lateral flanges 31 rigidwith and extending from opposite sides of the nozzle body I, as shownmore clearly in Figure 3.

The discharge port 4 and outlet port l5 of a fuel atomizing nozzle ofthe present type must be designed for the type and size of combustionchamber with which it is to be used. For instance, where the combustionchamber is of spheroidal design and no provision made for turbulencetherein, the atomized fuel should be ejected in cone shape, in whichcase the discombustion chamber is shallow but very broad and noprovision is made for turbulence within the combustion chamber, the fuelshould be ejected in a somewhat fan shape spray. This can orifice at itsinner or smaller end which ,is of triangular form as at When this isdone,

. a valve member I of the form shown in Figure 9 is substituted for thevalve member I, wherein the outlet port I5 is in thenature of a radialnarrow slot in the edge portion of the valve member 1. Such a slot-likeport cooperates with the triangular orifice 5' as illustrated by thediagram in Figure 17. In this way, a gradual increase in the volume offluid sprayed from the nozzle is effected as the valve member opens, butthe thickness of the flared spray will not be increased and will be keptin fan shape.

In other instances, particularly in connection with large engines, itwill be desirable to have several discharge ports in both the movablevalve member and the wall with which it cooperates. Examples of how thiscan be accomplished are found in Figures 13 and 18, and it will beapparent that the embodiment of Figure 13 is such that the lower end ofthe nozzle must project into the combustion chamber. Referring to Figure18, the wall member is held bythe screw ring 9' against'the lower end ofthe body proper I and is in the form of a hollow cone having the flaredports 4a at a plurality of points through the tapered wall thereof, theinner surface of this tapered wall constituting the bearing surface 3afor thevalve member 7a. The valve member la has a conical lower surfacecorresponding to the bearing surface 3a and is snugly seated againstsaid bearing surface by pressure as noted in con nection with Figure 1.The valve stem II is identical with that of Figure 1 and may be operatedin the same way.

In some cases, the pressure of the fluid may not be sufilcient toovercome the action of the spring 32. When such is the case, mechanicalmeans may be provided for periodically retracting the plunger 3| andcompressing the spring 32 so as to permit the fluid under pressure toactuate the rack bar 25 and cause opening movement of the valvemember 1. Such an arrangement is illustrated generally in Figure 15,wherein the lever 38 is pivoted intermediate its ends as at 39 and has aforked end engaging an abutment 40 carried by the projecting end of a'stem 4I carried by the plunger 3l, the other end of lever 38 beingoperatively associated with a rotary cam 42 suitably powerdriven. Eachtime the lever 38 is actuated by cam 42, the retraction of plunger 3|and compression of spring 32 is effected to permit the fluid underpressure to actuate the combined valve and piston member formed on anend of rack bar 25, thereby opening communication between the inlet 2and the interior of the nozzle body and at the same time actuating thevalve member 1 so as to open the same. As soon as thecam 42 releaseslever 38, the spring 32 will promptly return the parts to the positionof Figure 15 wherein the combined valve and piston member 35 is seatedto cut off communication between the inlet '2 and the interior of thenozzle body and the valve member l is rotated to closed position.-Otherwise, the device of Figure 15 corresponds with that of Figure 1,and it will be seen that the coacting faces of the movable valve memberand the wall provided with the bearing surface 3 may be machined toinsure against leakage therebetween.

As illustrated in Figure 16, the pressure of the fluid may not be reliedupon for effecting opening of the valve. In other words, the stem 29a ofthe rack bar 25a may be connected with the plunger 3la so that when thelever 38a is actuated as in Figure 15 to compress the spring 32a, itwill also act to'shift the rack bar 25a so as to turn the movable valvemember to open position. In this arrangement, the spring 32a is simplyrelied upon to return the movable valve member to closed position andmechanical means is provided for opening the movable valve member. As isalso illustrated in this embodiment, the rack bar 25a may notnecessarily have a combined valve and piston portion for cutting oflcommunication between the inlet 2 and the interior of the nozzle body,

In some instances, it is preferable to utilize an atomizing nozzle ofthe present kind within a horizontal chamber 20a provided in and openingthrough one side of the cylinder head l8a as shown in Figure 11, thebody Ia of the nozzle being horizontally disposed and having the discharge port 41; extending laterally through the wall thereof incommunication with the top in let of the combustion chamber 22a. In suchan arrangement, the only difference between the construction of Figure11 and that of Figure 1 will be that'theport 4b is a' lateral one andthe movable valve member will control the flow through this dischargeport 4b instead of through a port at the inner end of the nozzle body.To

bring this about. the inner end of the nozzle body may be closed by aplug 43, and the inner end portion of the valve stem Ila may be reducedto receive a split resilient valve sleeve 44 and to provide a rib 45arranged to engage between the ends of this split valve sleeve so thatrotation of stem Ila will be imparted to the valve sleeve 44. The stemIla will have a groove 46 behind the central portion of valve sleeve 44so as to admit the fluid between the stem Ila and said valve sleeve 44for ultimate passage through an outlet opening 41 provided in said valvesleeve 44. The outlet opening 41 will be arranged so that it willnormally be out of registry with the discharge port 4b but will be movedin registry therewith when the stem Ila is actuated by the pressure ofthefluid as in Figure 1. By tensioning the split valve sleeve 44 tonormally expand into contact with the bearing surface afforded by theadjacent portion of thewall of the bore in nozzle body I a, said valvesleeve 44 will at all times be snugly seated against such bearingsurface to avoid leakage. Otherwise, the operation will be exactly thesame as above described in connection with Figure 1, namely, a spring inthe housing 30 will actuate a rack bar to rotate the stem Ila and valvemember 44 to closed position, the pressure of the fluid overcoming theaction of this spring to rotate stem Ila and valve member 44 in theopposite direction to a position wherein such valve member 44 is openedas illustrated in Figure 12.

The type of construction shown in Figure 11, provision may be made foruse in a vertical position as in Figure 1, but with the lower end of thenozzle projecting into the combustion chamber. Also, this type ofconstruction may have a plurality of outlet ports 40 extending laterallythrough opposite sides of the nozzle body lc as shown in Figure 13. Withthis arrangement, the

lower or inner end of the valve body i c will be closed by a plug 43c,and the movable valve member may be provided by specially constructingthe inner or lower end of the valve stem llc. As shown, this stem mayhave its inner or lower end provided with a central longitudinal slot 36and transverse outlet ports 41 leading outwardly from the slot 46 to theexterior of the stem in the same horizontal plane as the discharge ports40. The valve stem He will of course be normally turned to a positionwherein the ports are out of registry with the ports to, the stem llcbeing rotatable in a direction to bring the ports 41 into registry withthe ports 40. With this arrangement, two cone-like sprays may besimultaneously ejected into the wmbustion chamber, the movable valvemember being normally closed by spring means and opened by fluidpressure operated or mechanical means as respectively shown in Figures 1and 17. The bifurcations formed by providing the slot 46 are preferablytensioned to spring apart and thereby have a snug seating engagementwith the bearing surface 30 afforded by the reduced bore portion of thenozzle body Ic.

From the foregoing description, the construction and operation, as wellas the advantages of the present invention, will be readily understoodand appreciated by those skilled in the art. It will be apparent thatthe invention is capable of finding embodiment in many different forms,and it is obvious that various changes may be made in the specificdetails of construction illustrated and described without departing fromthe spirit and scope of the invention as claimed.

What I claim as new is:

1. In a nozzle for atomizing fluid fuel and injecting the atomized fuelinto the combustion chamber of an internal combustion engine, andwherein the fluid fuel is forced through a minute orifice under highpressure, a hollow body having a fuel inlet and provided with a wallaffording an inner bearing surface, said wall having a tapered dischargeport at said bearing surface, said discharge port gradually flaringoutwardly from said bearing surface to the outer surface of said wall-toprovide a minute orifice and a knife edge at the inner end of said portand to present no ledge and no wall surfaces parallel with the axis ofsaid port on which atoms of fuel may accumulate, a valve memberrotatably fitted in said body and constantly engaged with and seated bypressure against said bearing surface, said valve member having anoutlet port movable into and out of registry with said discharge port ofthe body and adapted to cooperate with the latter to form a fine sprayof the fuel discharged through said discharge port into the combustionchamber, and means to periodically impart reciprocating rotary movementto said valve member for moving the outlet port of the latter into andout of registry with said discharge port.

2. In a nozzle for atomizing fluid fuel and injecting the atomized fuelinto the combustion chamber of an internal combustion engine, andwherein the fluid fuel is forced through a minute orifice under highpressure, a hollow body having a fuel inlet and provided with a wallaffording an inner bearing surface, said wall having a tapered dischargeport at said bearing surface,

' said discharge port gradually flaring outwardly from said bearingsurface to the outer surface of said wall to provide a minute orificeand a knife edge at the inner end of said port and to present no ledgeand no wall surfaces parallel with the axis of said port on which atomsof fuel may accumulate, a valve member rotatably fitted in said body andconstantly engaged with and seated by pressure against said bearingsurface, said valve member having an outlet port movable into and out ofregistry with said discharge port of the body and adapted to cooperatewith the latter to form a fine spray of the fuel discharged through saiddischarge port into the combustion chamber, and means to periodicallyimpart reciprocating rotary movement to said valve member for moving theoutlet port of the latter into and out of registry with said dischargeport, said movement imparting means including spring means acting toturn the valve member in one direction to a position wherein its port isout of registry with said discharge port of the body, and piston meansoperable by the pressure of the fuel thereon when said pressure exceedsthe strength of said spring means for turning the valve member in theopposite direction so as to bring its outlet port in registry with saiddischarge port of the body.

3.- In a fluid atomizing nozzle wherein the fluid is forced through aminute orifice under high pressure, a hollow body having a fluid inletand provided with a wall affording an inner bearing surface, said wallhaving a tapered discharge port at said bearing surface, said dischargeport gradually flaring outwardly from said bearing surface to the outersurface of said wall to provide a minute orifice and a knife edge at theinner end of said port, a valve member rotatably fitted in said body andconstantly engaged with and seated by pressure against said bearingsurface, said valve member having an outlet port movable into and out ofregistry with said discharge port of the body by imparting reciprocatingrotary movement to said valve member, spring means acting to turn thevalve member in one direction to a position wherein its port is out ofregistry with said discharge port of the body, and means operable by thepressure of the fiuid thereon when said pressure exceeds the strength ofsaid spring means for turning the valve member in the opposite directionso as to bring its outlet port in registry with said discharge port ofthe body, said last-named means including a valve member acting tonormally cut off communication between said fluid inlet and the interiorof the body.

4. In a fluid atomizing nozzle wherein the fluid is forced through aminute orifice under high pressure, a hollow body having a fluid inletand provided with a wall afiording an inner bearing surface, said wallhaving a tapered discharge port at said bearing surface, said dischargeport gradually flaring outwardly from said bearing surface to the outersurface of said wall to provide a minute orifice and a knife edge at theinner end of said port, a valve member rotatably fitted in said body andconstantly engaged with and seated by pressure against said bearingsurface, an operating stem for said valve member rotatably fitted insaid body, means to periodically impart reciprocating rotary movement tosaid stem and said valve member for intermittently opening and closingsaid discharge port, said wall comprising a disk removably fastened toan end of the body proper, said valve member comprising a ported diskhaving crossed grooves in the inner surface thereof, and said stemhaving an end formed to provide crossed bits engaging in said groovesand beveled to centrally engage and permit limited lateral tiltingmovement of the valve member relative to the stem and thereby insureconstant flat engagement of thevalve member with said wall.

5. In a fluid atomizing nozzle wherein the fluid is forced through aminute orifice under high pressure, a hollow body having a fluid inletand provided with a wall affording an inner bearing surface, said wallhaving a tapered discharge port at said bearing surface, said dischargeport gradually flaring outwardly from said bearing surface to the outersurface of said wall to provide a minute orifice and a knife edge at theinner end of said port, a valve member rotatably fitted in said body andconstantly engaged with and seated by pressure against said bearingsurface, an

operating stem for said valve member rotatably fitted in said body,means to periodically impart reciprocating rotary movement to said stemand said valve member for intermittently opening and closing saiddischarge port, said wall comprising a. disk removably fastened to anend of the body proper, said valve member comprising a ported diskhaving crossed grooves in the inner surface thereof, and said stemhaving an end formed to provide crossed bits engaging in said groovesand beveled to centrally engage and permit limited lateral tiltingmovement of the valve member relative to the stem and thereby insureconstant flat engagement of the valve member with said wall, and aspring acting on said valve stem to the reduced end of saidstem andconstituting said valve member, said rib being interposed between theends of said sleeve to provide a driving connection-between the sleeveand the stem, a port in said sleeve movable into and out of registrywith-the discharge port as the stem is turned in opposite directions,said sleeve being tensione'd to normallyexpand into snug engagement withforce the latter and the valve member toward said wall and thereby causepressure engagement of the valve member with said wall.

6. In a fluid atomizing nozzle wherein the fluid is forced through aminute orifice under high pressure, a hollow body having a fluid inletand provided with a lateral outwardly flared tapered discharge port, thebore of said body forming a bearing surface at said discharge port, avalve stem rotatably fitted in said hollow body and having a portedvalve member at one end seated by pressure against said bearing surface,spring means to rotate the valve stem so as to normally position thevalve member in closed position,

power-operated means for rotating the valve stem in the oppositedirection to bring the valve memher in open position with respect tosaid discharge port, an end of said valve stem being reduced andprovided at said reduced end with a longitudinal rib, a split springsleeve fitted on the reduced end of said stem and constituting saidvalve member, said rib being interposed between the ends of said sleeveto provide a driving connection between the sleeve and the stem, and aport in said sleeve movable into and out of registry with the dischargeport as the stem is turned in opposite directions.

7. In a fluid atomizing nozzle wherein the fluid is forced through aminute orifice under high pressure, a hollow body having a fluid inletand provided with a lateral outwardly flared tapered discharge port, thebore of said body forming a bearing surface at said discharge port, avalve 'stem rotatably fitted in said hollow body and having a portedvalve member at one endseated by pressure against said bearing surface,spring means to rotate the valve stem so as. to normally position thevalve member in closed position, power-operated means for rotating thevalve stem in the opposite direction to bring the valve A member in openposition with respect to said discharge port, an end of said valve stembeing reduced and provided at said reduced end with a surface.

longitudinal rib, a split springsleeve fitted on the bearing surface.

8. In a fluidatomizing nozzle wherein the fluid is forced through aminute orifice under high pressure, a hollow body having a fluid inletand provided with awallafiording an inner bearing surface, said wallhaving a tapered discharge port at said bearing surface, said dischargeport gradually flaring outwardly from said bearing surface to the outersurface'of said wall to provide a minute orifice and a knife edge at theinner end of said port, a valve member rotatably fitted in said body-andconstantly engaged with and seated by pressure against said bearingsurface, an operating stem for said valve member rotatably fitted insaid body, a segment gear on the outer end of said stem, a rack barmovable transversely of the stem and meshing with said segment gear,spring means acting on the rack bar to rotate the stem in a direction toturn the valve member to closed position, power-operated meansfor'actuating the rack bar in the opposite direction to rotate the stemand valve member in such opposite direction and vthereby'bring the valvemember in open position, and a combined piston and valve carried by therack bar normally seated to close communication between the inlet andthe interior of the valve body and operable by the pressure of the fluidwhen such pressure exceeds the strength of said spring zneans to turnthe valve member to open posi- 9. In a fluid atomizing nozzle whereinthe fluid is forced through a minute orifice under high pressure, ahollow body having a fluid inlet and provided with an end wall affordinga conical inner bearing surface, said wall having a plurality ofoutwardly flared tapered discharge ports therethrough at said bearingsurface, a valve disk member rotatably fitted in said body and having aconical lower surface constantly engaged with said bearing surface, anda valve stem rotatably fitted in the body and having driving engagementwith said valve disk member, said valve disk member having outlet portstherethrough movable into and out of registry with said flared dischargeports.

l0. a fluid atomizing nozzle wherein the fluid is forced through aminute orifice under high pressure, a hollow body having a fluid inletand provided with an end wall affording a conical inner bearingsurface,said wall having a plurality of outwardly flared tapered discharge portstherethrough at said bearing surface, a valve disk member rotatablyfitted in said body and having a conical lower surface constantlyengaged with said bearing surface, and a valve stem rotatably fitted inthe body and having driving engagement with said valve disk member, saidvalve disk member having outlet ports therethrough movable into and outof registry with said flared discharge ports, and'spring means acting onsaid valve stem-to force the latter and the valve disk member towardsaid wall and thereby maintain the valve disk member pressed againstsaid bear- FREDERICK C. GRISWOLD.

